Cutting and punching



M. H. BALLARD. CUTTIING AND Puucnmc. FILED DEc. 18. I920.

AZZQMQ/Z Patented den. 9, 1923.

s STATES PATENT oFicfE..,

MILTON I-I. BALLARD, OF LYNN, DIASSACHUSETTS, ASSIGNORITO UNITED SHOE MACHINERY CORPORATION, 01? PA'I'ERSON, NEW JERSEY, A COREORA'IION OF NEW JERSEY.

CUTTING AND PUNCHING.

T 0 aZZw/iom itmag concern:

Be it known that i \irnron H. Hermann, a citizen of the United States, residing at Lynn, in the county of Essex and State of Massachusetts, have invented certain Improvements in Cutting and Punching, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to cutting and punching and is herein shown with particular reference to a machine for perforating parts of boots and shoes. I

Perforating machines, as hitherto con structed, have been provided with an edge and presser foot but, whenever such members are temporarily removed or other wise thrown out of operation, as when perforating work at a C()1]Sld6l2tl')l6 distance from the edge or when repairing cripples, theiradjustment with respect to the work support and perforating tool is disturbed. and afterward must be made all over again. The presser foot for these memliiers does not function with Sll'l'llClQllt certainty since it is located wholly at the side of the edge gage and punch and usually has what is in effect a pivoted mounting so that when it is adjustedfor work of varying thicknesses its flat work-engaging portion is tilted and causes only one portion of the foot to engage the material. The perforations cannotbe located with the desired certainty since the pressure of the work against the edge gage tends to upset the thin edge of the material in front of the gage or else the tilted presser foot allows the work to curl or wrinkle between the punch and gage.

Difficulty is also experienced in locating and niiaintaining they: go opposite the punch the beginning of its work-feeding stroke. Unless the gage can be accurately located in this position, curved work cannot be properly punched since the punch will engage the work at the wrong distance from the c wed edge and prevent the proper turning of the work about the gage. Unless the gage has a positive means to maintain it in this position. opposite the beginning of the feed movement of the punch, there 18 great 11-- ability of scams or other inequalities in the work engaging the presser foot or gage and dragging them into thepathof the punch or other movable members. I v

It is one of theobjects of this invention to provide a perforating machine which will obviate the above mentioned defects. In accordance with one feature, the edge gage and presserfoot are provided with an improved mounting by which they can be swung out ofthe way. In the embodiment shown, the gage has a pivot shaftmounted" for rotation in an inclined bearing, the in clination causing the gage to be lifted out of the way it is rotated. The gage and pres ser foot are also provided with novel adjusting means to place them in the proper workengaging position and the adjusting means is so constructed that'the adjustments are not disturbed when the work-engaging mem bers are swung out of operative position. As shown, the pivot shaft of the edge is supported in a pinch collar which can be clamped in an axially adjusted position whenever the gage has a proper contact with the work support. The pinch collar is also adjustable angularly to adjust the gage in the line of feed and it is provided with positive means for limitingthis movement of the gage.

Another feature relates to an improved form of presser foot for holding the work during perforating. In the embodiment shown, the presser foot is provided with a pointed projection which conforms to the contour of the edge gage and punch and enters between them while the work is being perforated. The presser foot is furthermore mounted for vertical adjustment to suit work of different thicknesses and its active face always remains parallel with the work support so that it bears uniformly on the work. v

Referring to the -drawings,

Fig. l is a side elevation of a portion of a perforating machine to which my invention is applied; I

Fig. 2 is a perspective view, partly in section, of my improved gage and presser foot in its operative relation to the work, the punch being shown at the end of its feeding movement;

Fig. is a detail view.

in seetiomof the ad usting mechanism; a

Fig. 4 is a perspective View of the pinch collar and one of its clamping screws;

Fig. 5 is a plan View of a portion of the mechanism, showing the edge gage and presser foot in operative relation to the punch and the work, the punch being shown at the beginning of its feed movement.

The perforating machine to which my invention is shown as applied is of the type shown and described in United States Patent No. 941,704, granted Nov. 30, 1909, on an application of Louis N. Gr. Flynt. In the drawings, 2 indicates a portion of the overhanging frame carrying the oscillating carrier 4.- for a reciprocating punch bar 6 having at its lower end a punch 8. The machine also hasa presser foot bar 10 with an attached presser foot 12 and the usual punch presser foot is indicated at 14: (Fig. The work support comprises a table 16 having a slot for the reception of the paper backing strip 18 which is fed in the usual manner over a slightly curved punch block. All of the above described mechanism is old and well known and per se forms no part of my invention.

The gage and presser foot of my invention are mounted to swing from a position in engagement with the work to an out-of-theway raised position. They are mounted to swing on an inclined pivot in an inclined cylindrical casing or hearing 20 which may be secured to the framework by a clamp screw 22 passed through a slot in an extension of the casing. This adjustment provides means for adjusting the work-engaging members toward and from the punch to vary the distance of the line of perforations from the edge of the work. The edge gage comprises a portion 2% having a flat base and substantially cylindrical sides, the gage being carried on a shank 26 secured adjustably in a block 28 by means of a clamp screw 30. This adjustment provides means for ensuring a. flat contact between the base of the edge gage 24 and the work support or backing strip.

The gage presser foot 32 is comparatively narrow so as not to interfere materially with a view of the work and lies alongside of the, edge gage, a pointed projection 34 on the gage being adapted to enter between. the gage and the punch when the punch is at the beginning of the feed movement. The presser foot is pressed yieldingly against the work and also against the edge gage. As shown, the gage has a vertical cylindrical stem 36 which can slide and rotate in a bearing 38 of the bracket 40 and a reduced portion 42 of this stem extends upwardly through the bearing 44: and is threaded at its upper end for the reception of a thumb nut 46. This nut serves to adjust the gage vertically to adapt it for work of difierent thicknesses and moves the gage in such manner that it always remains parallel to the work support. F or holding the presser foot against both the work and the edge gage, a combined torsion and expansion spring as surrounds the reduced portion 42 of the stem and is secured both to the stem and to the upper hearing at. This construction also allows the presser foot to be swung away from the gage as when setting the latter. For raising the presser foot for insertion or removal of work there is provided a lever 52 pivoted at 50 to the bracket 40 and having an arm extending beneath the thumb nut 4:6. The bracket 40 carrying the presser foot has a lateral sleeve 5a mounted for adjustment on the shank 26 of the edge gage, a clamp screw 56 serving to hold the bracket in position.

The gage and presser foot form two work engaging members which are mounted toswing from a work engaging position to an out-oItl1e-way raised position in which there is plenty of room beneath the members for manipulation of special work. The mounting comprises a pivot shaft 60 secured to the block 28 and extending upwardly through an opening in the casing 20 the upper end of the shaft having a stop pin 62 for engagement with the clznnping block or pinch collar 6 This block or pinch collar serves as a supporting member for the gage and also as an adjusting member. The stop pin 62 is maintained in engagement with the upper surface. of the pinch collar by means of expansion spring 68 interposed between the bottom of the pinch collar and a second collar 66 pinned to the pivot shaft. Suiiicient space is left between this second collar and the block 28 to allow limited sliding movement of the shaft 60 through the base of the casing 20 so that the edge gage may properly contact with the work support. The above described mounting forms a floating pivot assembly movable axially to allow the gage to find its own proper contact with the work support automatically when the pinch collar is not secured.

The pinch collar may be secured in posi-. tion in the casing by means of two clamp screws 70 passed through the base of the casing and having reduced ends w zich contact with opposite radial faces '74 on the pinch collar. By loosening one of the clamp screws and tightening the other, the pinch collar may be adjusted migrularly to set the gage 2- .T opposite the punch at the beginning of the punch feeding movement. To limit the movement of the edge gage in the line of feed, the upper surface of the pinch collar has a shoulder 76 against which bears the stop pin 62 on the pivot shaft. A cam surface TS on the pinch collar also serves in co-operation with the spring 68 to maintain the stop pin against the shoulder. Opposite the shoulder 76, the pinch collar has a shallow depression 80 into which the stop pin 62 may snap when the work engaging members are swung around into their raised position. In this movement the cam surface 78 actsto raise the stop pin preparatory to its insertion inqthe shallow depression.

In the operation of the device, the clamp screws 70 are first loosened and the edge gage is moved about its inclined pivot until the gage lies directlybehind the punch when the latter is at the beginning of its feed movement. The gage descends by its own weight until its fiat base contacts with the work support. i The pinch collar is then rotated by manipulation of the clamp screws until the shoulder 76 is brought against the stop pin 62. This limits the movement of the gage and presser foot in the direction of feed and, when both screws are tightened, the axial and angular ad justment of the pinch collar can be maintained indefinitely without interfering with theturning of the gage and presser foot to an inopeative position. I The pointed projection 34 on the presser foot enters between the edge gage and the punch and serves to hold the work down between the gage and the punch. The presser foot may be adjusted vertically by manipulation of the thumb nut 46 to adapt it for work of diiteren-t thicknesses and may be raised by means of the lever 52 for insertion of the work. Whenever it is desired to punch material with the perforations arranged at a considerable distance from the edge or,

ii for any other reason, the edge gage and presser toot are not needed, they may be suulng out of the way around the inclined pivot. Afterwards, when the gage and presser toot are swung back into engagen ent with the work, they necessarily come back to their original positions without any disturbance oi the adjustment for proper contact with the work for which they were previously set. I

i-tlthough the invention has been shown and described with reference to a particular machine, it will be understood that the specific construction and arrangement of parts may be varied and modified without departing from the spirit of the invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine of the class described, in combination, an operating tool, a (o-operating member for engagement'with the work, and a mounting forthe member constructed and arranged to carry it from an operative posit-ion near the operating tool to a raised ontot-the-way position. I

2. In a machine of the class described, in combination, a punching tool, an edge gage,

and a mounting for the gage constructed and 1 arranged to carry it from an operative position near the punching tool to a raised. outot-the-way position.

3. In a machine of combination, an operating tool, an edge gage,

and an inclined pivot for the gage con-c structed and arranged to carry the latter from an operative P05111011. near the operatthe class described, in

ing tool to a raised, outotthe-way position.

I. In a machine oi the classjdescribed, in

combination, a work support, an operating meanstor adjusting the edge gage to bear, evenly on the work support, and amounts ing for the gage constructed and arranged to carry it to an out-ot-the-way position, without disturbing its adjustment for subsequent proper contact with the .work support. I

6. Ina machine of the. class described, in combination, a work support, a presser foot, means for adjusting the pres'ser foot to bear with the desired pressure on the work, and

a mounting for the presser :toot constructed and arranged to carry the presser foot to an (Alt-()li-llllG-Wzif, position without disturbingits adjustment for subsequent proper contact with work of the same thickness.

-7. In a machine of the class described, in combination, a perforating tool, a pressei' foot, and amounting for the presser foot constructed and arranged to swing it from an operative position near the perforating tool toa raised, out-of-the-way position.

8. In a machine of the class described, in combination, a perforating tool, a presser foot, and an inclined pivotal mounting for the presser toot constructedand arranged I to carry the latteri rom. an operative position near the perforating tool to araised,

outot-the-way position.

9. In a machine of the class described, in

combination, anoperating tooi, a combined edge gage and presser foot, and mounting for the gage. and presser :i'oot constructed and arranged to carry the gage and foot from an operative position near the operating tool toa raised, out-ot-the-way position.

10. In a machine of the class described, in

combination, a workdsupport, an edge gage having a pivot 'shai't, a pinch collar for supporting the pivot shaft for rotary movement, and means for clamping the collar in an axially adjusted position. automatically determined by the engagement of the edge gage with the work support. I I I 11. In a perforating machine, a feeding and punching tool, a work-engaging member, means for adjusting the work-engaging member in the line of feed, and positive means for limiting the movement of the member in the line of feed. 1

12. In a perforating machine, a feeding and punching tool, an edge gage, a pivotal mounting therefor, means for adjusting the edge gage about the pivot to set the gage opposite the tool at the beginning of the feed movement of the tool, and means for positively limiting the pivotal movement of the 13. In a machine of the class described, in combination, an operating tool, a Work-engaging member havin a pivot shaft, a pinch collar for supporting the work-engaging member and limiting its pivotal movement, and means for clamping the pinch collar in an angularly adjusted position to adjust the workengaging member with reference to the operating tool.

14; In a machine of the class described, in combination, an operating tool, a work support, an edge gage having a pivot shaft, an angular-1y and axially adjustable pinch collar for supporting the pivot shaft, and means for clamping the pinch collar in adjusted position with the gage resting on the work support in the desired proximity to the operating tool.

15. In a machine of the class described, in combination, an operating tool, a work-engaging member, a pivot shaft for the workengaging member constructed and arranged to carry the latter from an operative position near the operating tool to a raised, outof-the-way position, a support for the pivot shaft, a stop pin carried by the pivot shaft, a spring for holding the stop pin against the support, and a shoulder on the support for limiting the swinging of the worl -engaging member towards the operating tool.

16. In a machine of the class described, in combination, an operating tool, a work-em gaging member having a pivot shaft, a pinch collar for rotatably supporting the pivot shaft, a stop pin secured to the pivot shaft and spring pressed toward the pinch collar, a shoulder 011 the pinch collar for engagement with the stop pin to serve as a positive stop for preventing the work from dragging the work-engaging member towards the operating tool, and means for adjusting the pinch collar angularly to fix the position ofthe stop for limitingthe movement of the work-engaging member.

17. In a machine of the class described, in combination, an operating tool, a pivoted work-engaging member, a floating pivot as sembly for the work-engaging member, and clamp screws for adjusting the pivot assembly angularly and axially to adjust thework-engaging member with reference to the work and the operating tool, said pivot assembly allowing the work-engaging me1nher to be swung out of the way without disturbing its adjustment for subsequent proper contact with the Work.

18. In a machine of the class described, in combination, an operating tool, a work-engaging member, an inclined pivot shaft for thework-engaging member constructed and arranged to carry the latter from an operative position near the operating tools to a raised, out-of-the-way position, a support for the pivot shaft, a stop pin carried by the pivot shaft, a spring for holding the stop pin against the support, and a depression in-the support for engagement by the stop pin to hold the work-engaging member in the raised, out-of-the-way position.

19. In a machine of the class described, in combination, an operating tool, a work-em gaging member, an inclined pivot shaft for the work-engaging member constructed and arranged to swing the latter from an operative position near the operating tool to a raised, outof-the-way position, asupport forthe pivot shaft, :1- stop pin carried by the pivot shaft, a spring forholding the stop pin against the support, a depression in the support for engagement by the stop pin to hold the work-engaging member in the raised, out-ofthe-way position, and a shoulder on the support for engagement with the stop pin to limit the swinging movement of the work-engaging member.

20. In a machine of the class described, a Work support, an operating tool, a work-engaging member, a bearing, a block in thebearing for supporting the work-engaging member, and means for adjusting the block angularly and axially in the bearing to regulate the position of the work-engaging memher with relation to the operating tool and the work support.

21. In a machine of the class described, in combination, an operating tool, a work-engaging member, a bearing, a block in the bearing for supporting the work-engaging member, and a pair of clamping screws engaging opposite faces on the block for ad justing the latter angularly in the bearing to regulate the position of the work-engagingmember with relation to the operating tool.

22. In a machine of the class described, a work support, an operating tool, an edge gage, and a presser foot having a projecting portion conforming to the contour of the.

edge gage to prevent the'edge' of the work from turning up at the gage.

In a machine of the class described, a work support, a perforating tool, an edge gage, and a presser foot having a pointed projection entering between the gage and the perforating tool when the latter is at the punchin position to prevent the work from wrinkling between the gage and the operating tool.

Ql. In a machine of the class described, a work support, a feeding and punching tool, a presser :loot having a fiat face, means for adjusting the presser foot in the line of feed, and independent means for adjusting the presser foot in a direction to maintain its flat face parallel with the work support to bear evenly on all thicknesses of work.

25. In a machine of the class described, a work support, an edge gage, a presser foot, and a combined torsion and expansion spring to hold the presser foot against both the work and the gage.

26. In a machine of the class described, a work support, an edge gage, a presser foot pivotally mounted with respect to the edge gage, and a spring to hold the presser foot yieldingly in contact with the gage.

27. In a machine of the class described, a work support, an edge gage, a presser :foot, and a combined torsion and expansion spring to hold the presser foot against both the work and the gage, and means for lifting the presser foot to allow insertion of work.

28. In a perforating machine, in combination, a punch, an edge gage, and a pivotal mounting for the edge gage to allow the gage to be swung away from the punch and back again to the same location.

In testimony whereof I have signed my name to this specification.

MILTON H. BALLARD. 

